Fan guard mounting



Feb. 20, 1951 J, v H 2,542,735

FAN GUARD MOUNTING Filed May 27, 1948 Ewvgwrow, JOHN ME WEG H) PatentedFeb. 20, 1951 UNITED STATES PATENT OFFICE John H. Viewegh, Indianapolis,Ind.

Application May 27, 1948, Serial No. 29,541

1 Claim. 1

This invention relates to means for mounting a fan guard upon a motorwhich drives the fan. A primary object of the invention is to providemounting means whereby the guard may be mounted on a motor irrespectiveof its diameter of possible mounting location. In other words theinvention resides in providing means for mounting the guard on motors ofvarying diameters, and particularly of varying diameters of locations ofthrough-bolts. By reason of the peculiar mounting means forming the gistof the invention, the number of different sizes and devices for mountingthe guard are reduced to a minimum. While there may be considerablevariation in the diameters of motors driving a certain diameter fan, theguard may be mounted on any one of those motors without having to changethe guard itself in any respect.

These and other objects and advantages of the invention will becomeapparent to those versed in the art in the following description of oneparticular form of the invention as illustrated in the accompanyingdrawing, in which,

Fig. l is a View in front elevation of a structure embodying theinvention;

Fig. 2, a view in side elevation; and 3 Fig. 3, a detail on an enlargedscale in section on the line 33 in Fig. 1.

Referring to the drawing, wherein like charac ters of referenceindicated like parts in the several views thereof, the fan guarddesignated generally by the numeral ii] is made in the usual manner tohave primarily on its rear side a pair of circular hoops H and I2, thehoop I I at the rear being of a smaller diameter than is the diameter ofthe hoop i2 which is spaced forwardly a distance from the hoop I I. Inother words the planes of these two hoops H and I2 are spaced one fromthe other, normally in vertical positions.

A plurality of bars, herein shown as being formed of fiat bar stock andgenerally indicated by the numeral I3, four of the bars being employedin the present illustration, are equally spaced one from the othercircumferentially around and in interconnecting positions between thehoops II and I2. As best indicated in Fig. 3, the outer end of each barI3 is wrapped around the hoop E2, to form an eye 14 so as to securelygrip that hoop I2. The other end portion of the bar I3 is carried acrossthe outer side of the hoop II and secured thereto in any suitable mannersuch as by welding. From the weld position, the end portion of the barI3 in each instance is 2 carried inwardly in a plane parallel to theplane of the hoop I I to form a foot I5.

To each of these feet I5 is rockably secured an arm It by any suitablemeans, such as by a rivet II which passes through the foot I5 andthrough an end portion of the arm l8. Each of these arms I6 extends fromthe pivot rivet I! by a straight length and then terminates in an endportion I8 which is turned substantially at right angles to the majorlength by a finger constituting that end portion I8.

When the guard I0 is mounted to encircle the fan I9 and brought up tothe end portion of the motor Ziibehind the fan I9, these arms I6 arepresented in a manner whereby the major lengths thereof will besubstantially tangential to a circumferential portion of the motor 20and the fingers I8 turned inwardly therefrom toward the motor. As is thecase with most fan motors, there are a plurality of bolt ends 2Iprojecting from the end of the motor, four in number as a rule, to tietog-ether the motor ends 22 and 23 against the cylindrical centralmember 24 which carries the poles of the motor. Advantage is taken ofthis fact by engaging the ends of the fingers I8 under nuts 25 carriedon these bolts 2|. In other words these arms I6 are swung to theposition whereby holes provided in the end portions of the fingers I8will register with and permit the bolts 2| to extend therethrough sothat the nuts 25 may be pulled up against the outer faces of thesefingers. Therefore it is obvious that these arms I6 may be rocked abouttheir pivot rivets I! to accommodate the fingers I8 to various diametersof bolt circles which may be encountered on different types of motors.And it is also obvious that the diameter of these bolts may varyconsiderably and still be within the permissible range for attachment ofthese fingers I8 to the motor.

While I have herein shown and described my invention in the oneparticular form, it is obvious that structural changesmay be employedwithout departing from the spirit of the invention, and I thereforedo'not desire to be limited to that precise form beyond the limitationswhich may be imposed by the following claim.

I claim:

For a motor having a plurality of securing members circumferentiallyspaced apart on a circle having its center coincident with the axis ofsaid motor, means for mounting a fan guard having a rear hoop, saidmeans comprising a plurality of circumferentially spaced apart armsrockably secured to said rear hoop to be limited 4 to swing toward andaway from said motor in a REFERENCES CITED plane Para11e1 t q rear hoop;and ,finger The following references are of record in the on each armdirected inwardly at substantially a file of this patent. right anglerelative to its respective arm toward said motor for interengagementrespectively 5 UNITED STATES PATENTS with one of said securing members,each of said Numb Na e Dat fingers being presented in a commo plane p515,405 Meston Feb. 27, 1894 1e1 to said rear hoop; the lengths of Saarms 955,209 Rubin Apr. 19, 1910 being such that they will besubstantially n- 1,173,563 Griffin Feb, 29, 1916 gential wand entirelyoutside of said-circle when 10 said fingers are engaged with saidsecuring members.

JOHN H. VIEWEGH.

